Submitted:
27 December 2023
Posted:
29 December 2023
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Abstract
Keywords:
INTRODUCTION
- Clean Energy Transition: LNG, as a cleaner-burning fuel compared to other fossil fuels, can contribute to SDG 7 (Affordable and Clean Energy) by facilitating the transition to more sustainable energy sources. Deliverables include the development of advanced LNG processing technologies that reduce greenhouse gas emissions and promote the use of LNG as a cleaner fuel for power generation, transportation, and industrial applications
- Economic Growth and Decent Work: LNG program development can support SDG 8 (Decent Work and Economic Growth) by creating employment opportunities and promoting economic growth. Deliverables involve the establishment of LNG infrastructure and facilities, which require skilled labor and generate job opportunities in construction, operations, and maintenance. Additionally, promoting local content in LNG projects can enhance the socio-economic development of communities
- Climate Action: LNG program development can contribute to SDG 13 (Climate Action) by reducing greenhouse gas emissions. Deliverables include the implementation of advanced techniques such as carbon capture and storage (CCS) to capture and store CO2 emissions from LNG production and transportation. Additionally, investing in research and development to improve energy efficiency in LNG processes can further reduce the carbon footprint of LNG projects
- Sustainable Infrastructure: LNG program development can align with SDG 9 (Industry, Innovation, and Infrastructure) by promoting the development of sustainable and resilient infrastructure. Deliverables involve the utilization of advanced engineering techniques to design and construct LNG facilities that minimize environmental impact, ensure safety, and enhance energy efficiency.
- Partnerships and Knowledge Sharing: Collaboration and knowledge-sharing among stakeholders involved in LNG program development can contribute to SDG 17 (Partnerships for the Goals). Deliverables include the establishment of partnerships between governments, industry players, and communities to exchange best practices, share research findings, and collectively work towards sustainable development goals.
- To analyze and evaluate advanced techniques for LNG program development: The research study aims to explore and assess innovative techniques and technologies that can enhance various aspects of LNG program development, such as production, transportation, storage, and utilization. This includes evaluating advanced liquefaction processes, optimizing logistics and supply chain management, and investigating emerging trends in LNG utilization.
- To assess the economic viability and sustainability of advanced LNG techniques: The research study seeks to analyze the economic feasibility and sustainability of implementing advanced techniques in LNG program development. This includes evaluating the cost-effectiveness, environmental impact, and long-term viability of adopting advanced technologies, such as carbon capture and storage (CCS), re-liquefaction units, and innovative liquefaction processes.
- 3 To provide recommendations and guidelines for integrating advanced techniques into LNG programs: The research study aims to provide practical recommendations and guidelines for industry stakeholders, policymakers, and project developers on how to effectively integrate advanced techniques into LNG programs. This includes identifying best practices, highlighting potential challenges and risks, and outlining strategies for successful implementation
- Advancing sustainability in the LNG industry:: The research study can contribute to the sustainability of the LNG industry by identifying and promoting advanced techniques that reduce environmental impact, lower carbon emissions, and enhance energy efficiency. This aligns with global efforts to address climate change and achieve the targets set in the United Nations Sustainable Development Goals.
- Enhancing economic competitiveness and profitability: By evaluating the economic viability of advanced LNG techniques, the research study will provide valuable insights to industry stakeholders, helping them make informed decisions that optimize project economics, improve operational efficiency, and maximize profitability. This can attract investment, drive innovation, and enhance the overall competitiveness of the LNG sector.
- 3 Informing policy development and regulatory frameworks: The research study will serve as a valuable resource for policymakers and regulators in formulating effective policies and regulations related to LNG program development. By providing evidence-based insights, the study can help shape a conducive regulatory environment that encourages the adoption of advanced techniques, promotes sustainability, and ensures safety and compliance in the industry. Overall, the research study aims to advance the understanding and application of advanced techniques in LNG program development, thereby contributing to sustainability, economic viability, and informed decision-making in the industry.
LNG Advancement Case Study

- Marine Facilities (6%): This category represents the cost associated with the construction and development of infrastructure specifically designed for marine operations related to LNG advancement.
- Well (12%): The well category encompasses the expenses involved in drilling and completing wells for the extraction and production of LNG.
- Sub Infrastructure (5%): This section refers to the costs related to the development of supporting infrastructure and systems that are vital for the functioning of the LNG facility but are not directly associated with the core operations.
- Offshore Facilities (12%): This category includes the expenses associated with the construction, installation, and maintenance of facilities situated offshore, such as platforms or storage units.
- Delivery Truckline (12%): The delivery truckline segment represents the costs involved in establishing and maintaining a dedicated transportation system for the distribution of LNG via trucks.
- Onshore Site Preparation (5%): This category covers the expenses associated with the preparation of the onshore site, including land acquisition, site clearing, and soil stabilization.
- Site Civil Work (6%): Site civil work refers to the costs incurred in constructing the necessary infrastructure, such as roads, drainage systems, and utilities, within the LNG facility site.
- LNG Plants (37%): This is the most significant cost category and represents the expenses related to the construction, operation, and maintenance of the LNG processing plants, including equipment, machinery, and labor.
- Product Storage (5%): This section includes the costs associated with the construction and maintenance of storage facilities specifically designed for storing LNG
Identifying Optimal Locations for LNG Development"

- Initial Site Assessment: The first step in site identification involves conducting an initial assessment to evaluate potential locations. This includes analyzing geographical factors like proximity to natural gas reserves, waterways, and transportation networks. Additionally, considerations such as land availability, site accessibility, and local community dynamics are taken into account.
- Infrastructure Evaluation: Assessing the existing infrastructure is crucial in determining site suitability. This includes evaluating the availability and capacity of transportation networks, power supply, and utility connections. Proximity to existing LNG facilities and related infrastructure can also influence site selection decisions, enabling cost-effective integration into the broader LNG network.
- Environmental Impact Assessment: A comprehensive environmental impact assessment is conducted to evaluate the potential ecological, social, and cultural impacts of the chosen site. Factors such as air and water quality, noise pollution, ecological sensitivities, and stakeholder engagement are carefully examined. Mitigation strategies, including sustainability measures and adherence to environmental regulations, are developed to minimize negative impacts.
- Regulatory Considerations: In the site identification process, organizations must navigate the complex landscape of regulatory frameworks and permits. Compliance with local, regional, and national regulations pertaining to land use, environmental protection, safety standards, and zoning is crucial. Engaging with regulatory bodies and stakeholders helps ensure alignment with regulatory requirements and facilitates a smoother project implementation process..
ENVIRONMENTAL ISSUES AND THE VALUE OF PRE-INVESTING IN ACCURATE DATA
- Risk Reduction: Incorporating accurate environmental data into the design process helps identify and address potential risks. By understanding the environmental factors unique to the project site, including seafloor conditions, coastal erosion patterns, and marine biodiversity, organizations can develop appropriate design strategies that enhance safety and minimize environmental impact.
- Optimized Design: Accurate environmental data provides a solid foundation for designing subsea, pipeline, offshore, and onshore structures. By considering factors such as seabed geology, wave and tidal patterns, and wind loads, engineers can optimize the design of foundations and support structures, ensuring their durability and resilience to environmental conditions.
- Environmental Compliance: Pre-investing in environmental data allows organizations to proactively assess and comply with environmental regulations and guidelines. By understanding the ecological sensitivities of the project area, including protected species and habitats, organizations can develop mitigation strategies, implement appropriate safeguards, and navigate the regulatory landscape effectively.
- Stakeholder Engagement: Having accurate environmental data facilitates meaningful stakeholder engagement. By sharing detailed information about potential environmental impacts and mitigation measures, organizations can foster transparent and constructive dialogue with local communities, regulatory bodies, and environmental organizations. This engagement helps build trust, improve project acceptance, and ensure that community concerns are addressed.
WHEN CONSIDERING ENVIRONMENTALLY SENSITIVE ASPECTS OF LNG PROJECTS, SOME KEY AREAS TO FOCUS ON INCLUDE
- Site for Offshore Facilities: The selection of an offshore site for facilities such as floating liquefaction units or offshore platforms requires careful consideration of environmental factors. This includes assessing the impact on marine ecosystems, fisheries, coral reefs, and the potential disturbance to sensitive habitats.
- Site for Onshore Plant: The location of the onshore plant should also take into account environmental concerns. Factors such as air and water quality, noise pollution, and proximity to residential areas or protected lands need to be considered during site selection. Measures to mitigate potential impacts, such as noise barriers or emissions control technologies, may be implemented.
- Trunkline Route: The route selection for the trunkline, which transports natural gas from the offshore site to the onshore plant, needs to consider environmental sensitivities. This includes minimizing disturbance to ecosystems, avoiding or mitigating impacts on marine wildlife and habitats, and considering potential interactions with other marine activities, such as fishing or shipping lanes.
- Trunkline Beach Crossing: If the trunkline needs to cross a beach or coastal area, specific attention must be given to minimize impacts on coastal ecosystems, dunes, and beaches. Environmental assessments may be conducted, and construction and mitigation measures such as directional drilling or trenchless technologies may be employed to reduce disturbances
- LNG Tanker Operations: The operation of LNG tankers involves various environmental considerations, including minimizing air emissions, preventing accidental spills, and ensuring safe navigation and maneuvering in environmentally sensitive areas such as marine protected areas or near coastal communities. Compliance with international regulations and industry best practices is crucial to mitigate potential environmental risks. By addressing these environmentally sensitive aspects and incorporating appropriate mitigation measures, LNG projects can strive to minimize their environmental footprint and ensure sustainable operations.
WHEN CONSIDERING THE ENVIRONMENTALLY SENSITIVE ASPECTS OF DREDGING FOR LNG PROJECTS, HERE ARE TWO IMPORTANT FACTORS TO TAKE INTO ACCOUNT
- Dredging for LNG Jetty: The construction of an LNG jetty often involves dredging activities to create a suitable berth for LNG tankers. Dredging can have potential environmental impacts, such as sediment disturbance, alteration of water flow patterns, and potential impacts on marine life and habitats. It is important to carefully plan and execute dredging activities to minimize these impacts. This may include conducting environmental assessments, implementing sediment control measures, monitoring water quality, and employing techniques like turbidity curtains or sedimentation ponds to mitigate the spread of sediment and protect surrounding ecosystems.\
- Construction Rock Availability and Quality: The availability and quality of construction rock for various aspects of LNG projects, such as breakwaters, revetments, or coastal protection structures, can also be an environmentally sensitive issue. Extraction of construction rock from quarries or offshore sources may have potential impacts on habitats, coastal erosion, or water quality. It is important to ensure that rock extraction is conducted in a sustainable manner, adhering to environmental regulations and guidelines. Evaluating alternative sources or utilizing recycled materials can also contribute to minimizing the environmental footprint associated with construction rock extraction. By considering these factors and implementing appropriate environmental management strategies, LNG projects can effectively address the potential environmental impacts associated with dredging, LNG jetty construction, and the sourcing of construction rock .

NOTE
FOCUSING ON SUBSEA RECOVERY SYSTEMS AND THEIR CONSIDERATIONS


Here’s an overview of the floating and bottom fixed options commonly utilized in offshore facility development
- Floating LNG Facility (FLNG): A floating vessel that incorporates liquefaction facilities to produce LNG directly at the offshore field.
- Floating Production, Storage & Offloading Facility (FPSO): A floating vessel that combines production, storage, and offloading capabilities for hydrocarbon resources.
- Semi-Submersible (Semi Sub): A floating platform with multiple buoyant hulls that partially submerge in the water, providing stability for various offshore operations.
- Tension Leg Platform (TLP): A vertically moored floating platform that uses tensioned tendons to keep it stable in deepwater environments.
- Steel Jacket: A fixed structure consisting of vertical steel tubular members supporting the topside facilities.
- Jack-up: A self-elevating platform that rests on legs and can raise or lower its hull to work at different water depths.
- Concrete: A fixed structure constructed using precast or cast-in-place concrete elements.
- Hybrid: A combination of different elements, such as a steel or concrete substructure combined with other materials, to suit specific project requirements.
- Proprietary: Custom-made and installed solutions tailored to specific project needs, often involving unique engineering and construction methods.
THE TOPSIDE FACILITIES OF OFFSHORE INSTALLATIONS PLAY A CRUCIAL ROLE IN THE OVERALL DESIGN AND OPERATION OF OFFSHORE FACILITIES.
- Compression Capacity: Determining the required compression capacity involves evaluating the current and anticipated future gas production rates, as well as the decline in reservoir pressure. This assessment helps in selecting the appropriate compression technology and sizing the compression facilities accordingly.
- Compression System Design: Stakeholders need to choose between various compression system designs, such as centrifugal compressors or reciprocating compressors, based on factors like efficiency, reliability, and operational requirements. The design should consider factors like power supply, space availability, and weight limitations.
- Installation Timing and Phasing: The decision on when to install compression facilities is crucial. It may involve considering the decline in reservoir pressure, production profiles, and economic factors. Phasing the installation can help optimize CAPEX and match compression capacity with the field’s changing requirements over time.
- Integration with Existing Facilities: If there are already existing topside facilities, the decision on compression installation needs to account for the integration of the compression system with the existing infrastructure. This includes evaluating space availability, compatibility with existing equipment, and potential modifications required for seamless integration. By carefully considering these factors, stakeholders can make informed decisions regarding compression installation and phasing, ensuring the efficient and cost-effective operation of offshore facilities throughout the production life cycle.
The trunkline plays a crucial role in transporting gas from the offshore field to the LNG plant.
- Wet Operation: In a wet operation, the gas is transported in the trunkline with the presence of liquids (typically hydrocarbons like condensate or water). Operating wet offers the advantage of reducing the need for additional offshore equipment and simplifying offshore facilities. This can potentially enable the operation of an "unmanned" facility, requiring minimal human intervention. However, wet operation comes with certain downsides. One of the main considerations is the higher pipeline material costs due to the need for corrosion-resistant materials. Additionally, chemical injection, such as corrosion inhibitors or hydrate inhibitors, becomes necessary to manage the flow assurance issues associated with the presence of liquids. Regular pigging (pipeline cleaning) may also be required to maintain the flow and integrity of the trunkline.
- Dry Operation: In a dry operation, the trunkline transports gas without the presence of liquids. This approach eliminates the challenges associated with liquids, such as hydrate formation and the need for chemical injection. It may also reduce pipeline material costs. However, dry operation may require additional offshore equipment and infrastructure to separate and handle the liquids at the offshore field.
- Wet Operation with MEG Injection: Another approach is operating the trunkline wet with MEG injection. MEG is a common hydrate inhibitor used to prevent the formation of hydrates in the pipeline. This approach provides a balance between the advantages of wet operation (simplified offshore facilities) and mitigating flow assurance issues (hydrates). However, it does add the cost of MEG injection and the need for monitoring and managing MEG injection rates. When deciding on the operational approach for the trunkline, stakeholders must carefully weigh the trade-offs between simplicity, cost, flow assurance, and overall project objectives. By considering factors such as pipeline material selection, chemical treatment requirements, pigging schedules, and hydrate prevention strategies, stakeholders can ensure the safe and efficient transportation of gas from the offshore field to the LNG plant.
The Onshore Facility, As Depicted In Figure 1, Represents a Substantial Portion Of The Total Program Investment, Accounting For Approximately 60% Of The Overall Cost.
- Design Efficiency: Ensuring the onshore facility is designed with efficiency in mind can lead to cost savings. This involves optimizing the layout, streamlining the process flow, and integrating advanced technologies to improve operational efficiency and reduce footprint.
- Construction Strategies: Employing innovative construction strategies, such as modular construction or prefabrication, can help reduce construction time, minimize on-site work, and lower labor costs. Leveraging low-cost centers for fabrication, as mentioned earlier, can also contribute to cost reduction.
- Process Optimization: Continuously improving and optimizing the onshore facility’s processes can lead to increased productivity, energy efficiency, and reduced operational costs. This can involve implementing advanced control systems, utilizing digital technologies for real-time monitoring and optimization, and adopting energy-saving initiatives.
- Supply Chain Management: Efficient supply chain management is crucial for cost reduction. Identifying opportunities for local sourcing, negotiating favorable contracts with suppliers, and implementing effective logistics strategies can help reduce material costs and transportation expenses.
- Operational Excellence: Implementing best practices for operations and maintenance can contribute to long-term cost savings. This includes proactive maintenance strategies, effective asset management, and leveraging data analytics for predictive maintenance and optimization. By focusing on these areas and continuously seeking opportunities for improvement, stakeholders can achieve significant cost reductions and improve the overall life cycle economics of the onshore facility, thereby enhancing the project’s overall financial performance

- Utilities (16%): This category represents the expenses associated with the provision and installation of utility systems necessary for the operation of the onshore LNG facility, such as electricity, water, and gas supply.
- Storage Off-Site (27%): The storage off-site segment encompasses the costs related to the construction and maintenance of storage facilities located outside the main onshore LNG facility, typically used for additional storage capacity.
- Fractionation (3%): This category includes the costs involved in the fractionation process, which is the separation of different components of natural gas to obtain desired products or streams.
- Dehydration and Mercury Removal (2%): The dehydration and mercury removal section represents the expenses associated with the removal of moisture and mercury from the natural gas stream to meet quality standards.
- Acid Gas Removal (6%): This category covers the costs related to the removal of acid gases, such as hydrogen sulfide and carbon dioxide, from the natural gas stream to comply with environmental and safety regulations.
- Refrigeration (17%): The refrigeration segment represents the expenses involved in the cooling and liquefaction of natural gas through the use of refrigeration systems, ensuring the gas is converted into a liquid state for storage and transportation.
- Liquefaction (28%): This is the most significant cost category and represents the expenses associated with the process of converting natural gas into liquefied natural gas (LNG) through the application of high pressure and low temperature.
- Others (1%): The "Others" category includes any additional costs that are not specifically covered by the aforementioned categories but are still relevant to the onshore advancement of the LNG facility
WHEN CONSIDERING THE SIZE AND NUMBER OF LNG TRAINS, THERE ARE SEVERAL CRITICAL FACTORS TO TAKE INTO ACCOUNT
- Reservoir size: The availability and capacity of the gas reservoir will play a crucial role in determining the appropriate size and number of trains.
- Site conditions and plot space: The physical limitations and available plot space at the intended location will influence the selection of train size and number.
- Existing infrastructure: The presence of pre-existing infrastructure, such as pipelines and storage facilities, can impact the decision-making process, as it may influence the optimal train size and number.
- Phased-in capacity: It is often advantageous to adopt a phased-in approach, starting with smaller trains and gradually adding more trains as demand for LNG in the market grows. This approach ensures that the facility can meet future expected demand without overcommitting resources initially.
- Greenfield or expansion: The choice between building a new facility from scratch or expanding an existing one depends on various factors, including cost considerations and the feasibility of replicating existing trains.
- Economies of scale: The potential cost savings achieved through economies of scale should be considered. For instance, a single train facility may save more than 10% in capital costs compared to two trains operating at 50% capacity each.
- Future expansion provisions: It is wise to incorporate provisions for future expansion in the initial design phase, allowing for increased capacity if required in the future. By carefully evaluating these factors, a comprehensive and efficient plan can be devised to determine the optimal size and number of LNG trains for a given project.
- Major equipment size limitations: The physical size limitations of key equipment, such as the AGR absorber, main cryogenic exchanger, and C3 compressor, need to be taken into account. These limitations can affect the overall train size and configuration.
- Vendor base for large equipment: The availability and capability of vendors to manufacture and supply large-scale equipment is crucial. The vendor base must be able to support the construction and installation of the chosen train size.
- Transportation constraints: The logistical aspects of transporting equipment from manufacturing facilities to the construction site can impose limitations on train size. Constraints such as road width, weight restrictions, and transportation infrastructure should be considered.
- Modularization plant constraints: In the case of modularized plants, the maximum size of transportable modules can influence the train size. Site conditions, such as available space and infrastructure, may impose limitations on the size and configuration of modular units. Considering these factors alongside the previously mentioned ones will ensure a comprehensive evaluation of all relevant aspects when determining the optimal size and number of LNG trains for a given project.

- Environmental regulation: Bringing in modules to the construction site may incur costs related to environmental compliance. This includes adhering to regulations for transportation, waste management, and minimizing environmental impact during module installation.
- Permitting process: In cases where lengthy permitting processes are involved, starting work at the fabrication site early can help reduce the overall program schedule. By leveraging modularization, construction activities can progress simultaneously at different locations, saving time in the field.
- Local skilled labor availability: Assessing the availability of skilled labor in the local area is crucial. If the site lacks sufficient skilled workers, additional considerations such as workforce training or recruitment from other areas may be necessary.
- Site access: Ensure that there is suitable access to the construction site for transporting and installing modules. Considerations may include road conditions, bridges, or water access for transportation via barges or heavy lift vessels.
- Plot space limitation: Evaluate the available plot space at the construction site to determine if it can accommodate the necessary modules. Modularization requires adequate space for assembly, storage, and installation of the modules.
- Weather-related delays and construction window: Assess potential weather-related challenges and their impact on the construction schedule. Consider factors such as high wind conditions, extreme temperatures, or limited construction windows due to seasonal or environmental constraints. By addressing these site-specific issues and incorporating them into the project planning, the benefits of modularization can be maximized while mitigating potential challenges. This ensures a smooth and efficient construction process for LNG projects.
- Water depths: If the water depths leading to the construction site are not sufficient to accommodate the draft of the vessels transporting the modules, dredging may be necessary to deepen the waterways. This ensures safe passage for the vessels and prevents any grounding or navigational issues.
- Channel width: The width of the channel leading to the construction site may impact the maneuverability of the vessels carrying the modules. If the channel is not wide enough for the vessel’s dimensions, dredging may be required to widen the channel or create turning basins to facilitate navigation.
- Approach area: The area near the construction site where the modules will be offloaded and positioned may need dredging if it is too shallow or obstructed. Dredging can create a suitable seabed foundation for module installation and ensure sufficient clearance for equipment during the offloading process.
- Environmental considerations: Dredging activities must also take into account any environmental regulations or restrictions in place to protect marine ecosystems. Environmental impact assessments and mitigation measures may be required to minimize any potential adverse effects. The extent of dredging required will be determined through detailed engineering and site surveys to assess the specific conditions and requirements of the project. It is crucial to work closely with environmental authorities and stakeholders to ensure compliance with regulations and minimize environmental impact. By carefully evaluating the site conditions and conducting thorough dredging planning, the necessary modifications can be made to facilitate the safe and efficient transportation and installation of large modules for LNG projects.
- Reduced Process System Splitting: The use of larger modules allows for fewer process systems to be split between modules, streamlining the construction process and reducing complexity
- Decreased Inter-Module Connections: Larger modules require fewer inter-module connections, minimizing the need for complex piping and electrical installations, leading to potential cost savings.
- Optimization of Man-Hours per Ton: Fabrication and installation efforts are more efficient with larger modules, resulting in reduced man-hours per ton of module, thus reducing labor costs.
- Streamlined Engineering Efforts: The use of larger modules simplifies the engineering process, as less design work is required compared to smaller, more fragmented modules.
- Efficient Plot Area Utilization: Larger modules enable the optimal utilization of plot areas, allowing for more efficient use of available space at the construction site.
- Reduced Number of Motor Control Centers (MCC): The use of larger modules can result in a reduced number of MCCs, leading to potential cost savings in terms of equipment, cabling, and installation. Through a comprehensive analysis of these cost-saving benefits, this research aims to provide valuable insights into the strategic advantages of employing larger modules in LNG program development. By uncovering the potential of advanced techniques, we can unlock new opportunities for optimizing project costs and enhancing the overall efficiency of LNG program implementation.
- Hydrotesting and PCO (Pre-Commissioning and Commissioning) Work: Larger modules provide a more accommodating space for hydrotesting and PCO activities, allowing for easier and more comprehensive testing and commissioning processes. This ensures a higher level of quality control and reduces the likelihood of issues arising during operation.
- Reduced Foundation Requirements: The use of larger modules results in fewer individual components, leading to reduced foundation requirements. This simplifies the construction process and minimizes the need for extensive groundwork, further streamlining the project schedule.
- Enhanced Production Quality: With more fabrication hours spent at the fabrication site, the manufacturing process can be better optimized, resulting in improved quality control and workmanship. This contributes to the overall quality and reliability of the completed LNG facility.
- Accommodation of Larger or Taller Equipment: Larger modules provide the flexibility to accommodate larger or taller equipment, which can be challenging with smaller modules. This allows for better integration of specialized equipment and reduces potential constraints during installation and operation.
- Reduction in Schedule at the Installation Site: The use of larger modules can significantly reduce the schedule at the installation site, facilitating a faster start-up process. This expedited schedule minimizes project timelines, leading to quicker commercial operation and revenue generation. By considering these additional benefits, the research aims to provide a comprehensive understanding of the advantages of larger modules in LNG program development. The findings will contribute to strategic decision-making and the adoption of advanced techniques, ultimately enhancing the efficiency and success of LNG projects.

Super modules, weighing between 2000-5600 tons, offer a range of benefits in LNG program development. These advantages include:
- Substantial Reduction in Site Labor Hours: The use of super modules significantly reduces the number of on-site labor hours required for construction. With larger modules, a significant portion of the fabrication and assembly work is completed off-site, leading to reduced on-site construction time and labor costs.
- Improved Safety with Less Site Exposure: Utilizing super modules enhances safety by minimizing on-site exposure. With a reduced number of construction activities and workers on-site, the potential risks and hazards associated with construction operations are significantly reduced.
- Wider Contractor Pool for Remaining Work Scope: By utilizing super modules, the remaining work scope on-site can be completed by a wider pool of contractors. This opens opportunities for engaging specialized contractors who may not have been available or viable for smaller module-based projects.
- Up to 50% Reduction in Plot Space: The use of super modules allows for a significant reduction in plot space requirements. With larger modules consolidating multiple components and systems, a smaller footprint is needed, optimizing the use of available land and potentially reducing lease or acquisition costs.
- Significant CAPEX Savings: Super modules offer substantial capital expenditure (CAPEX) savings. The efficiencies gained through off-site fabrication, reduced labor hours, and lower plot space requirements contribute to overall cost reductions, enhancing the project’s economic viability.
- Reduced Site Directs: Super modules streamline the construction process and reduce the need for on-site direct materials and equipment. This leads to decreased site directs, such as the procurement and transport of construction materials, resulting in additional cost savings.
- Reduced Camp Requirements: The use of super modules can lead to reduced camp requirements for construction workers. With fewer on-site labor hours, the need for extensive worker accommodations and facilities is minimized, resulting in potential cost savings. By highlighting these benefits, the research aims to showcase the advantages of utilizing super modules in LNG program development. The findings will support informed decision-making and promote the adoption of these advanced techniques to drive efficiency, cost-effectiveness, and improved outcomes in LNG projects.
- Mitigates adverse weather impact: Opting for a modular approach minimizes the exposure and cost/schedule impact in case of prolonged periods of unfavorable weather conditions.
- Relieves pressure on local infrastructure: By utilizing modular construction, there is reduced strain on social infrastructure at the job site since a significant portion of the construction is done off-site. This can help alleviate congestion and disruptions in the local community.
- Maximizes cost optimization: Embracing a modular approach offers the highest potential for cost optimization by identifying and maximizing areas where modularization can be implemented effectively, leading to improved efficiency and reduced expenses.
- Access to a broader labor market: Modular construction allows for greater flexibility in labor sourcing, as it is not solely dependent on local labor conditions. This opens up opportunities to tap into a wider labor market, potentially accessing specialized skills and expertise that may not be available locally
- Encourages competitive bidding: The use of modular fabrication can enhance competitive bidding for construction projects. By engaging multiple module fabricators, there is increased competition, leading to potentially lower costs and improved quality.
- Reduces on-site infrastructure requirements: Adopting a modular approach minimizes the infrastructure requirements at the job site since many components are prefabricated off-site. This can lead to a more streamlined and efficient construction process. These additional reasons highlight the benefits of a modular approach beyond just cost considerations, emphasizing factors such as risk mitigation, community impact, labor flexibility, competitive advantages, and streamlined on-site operations
- Compact Design: Designing the plant layout in a compact manner, optimizing the arrangement of equipment, facilities, and infrastructure to minimize the overall footprint. This involves carefully considering the spatial requirements and ensuring efficient utilization of available space.
- Vertical Integration: Utilizing vertical integration techniques, such as multilevel structures or stacked equipment, to make the most efficient use of available vertical space. This approach allows for the consolidation of operations within a smaller plot area.
- Modular Construction: Implementing modular construction techniques where feasible, which involves constructing various components or modules off-site and then assembling them on-site. This approach reduces the space required for on-site construction activities and allows for faster installation.
- Process Optimization: Analyzing and optimizing the processes involved in LNG production to identify opportunities for space reduction. This can involve streamlining workflows, eliminating unnecessary equipment or redundancies, and optimizing equipment sizing.
- Innovative Technologies: Exploring the use of advanced technologies, such as compact equipment designs or novel process configurations, that can achieve the same production output with a smaller physical footprint. By incorporating these master planning strategies, it is possible to achieve significant plot space reduction, leading to cost savings, efficient utilization of limited space, and the ability to accommodate additional LNG trains within existing complexes.
A MOTOR-DRIVEN LNG PLANT REFERS TO A FACILITY WHERE THE POWER NEEDED TO DRIVE THE LIQUEFACTION PROCESS IS SUPPLIED BY GAS TURBINES (GTS) OR COMBINED CYCLE GAS TURBINES (CCGTS).
- Higher production efficiency: A motor-driven plant enables higher LNG production due to increased operational efficiency. The use of large motors allows for more effective compression of natural gas, optimizing the liquefaction process and resulting in a greater output of LNG
- Higher thermal efficiency: Motor-driven plants can achieve higher thermal efficiency compared to plants powered by gas turbines. This means that a greater percentage of the energy input is converted into usable power, leading to improved overall efficiency and reduced energy waste
- Lower CO2 emissions: Motor-driven plants typically generate lower carbon dioxide (CO2) emissions compared to gas turbine-driven plants. This is due to the higher efficiency and cleaner combustion associated with motors, resulting in a reduced environmental impact.
- Shorter delivery schedule: Motors generally have shorter delivery schedules compared to gas turbines. This can contribute to a more streamlined project schedule, reducing the overall time required for construction, installation, and commissioning of the LNG plant.
- Modular design suitability: Motor-driven plants are well-suited for modular design approaches. The use of motors facilitates modular construction, making it easier to fabricate and assemble components off-site. This leads to lower installed costs, improved construction efficiency, and potentially shorter project timelines. By leveraging these commercial benefits, operators and developers of LNG plants can enhance their profitability, reduce environmental impact, and optimize project execution. Incorporating motor-driven systems can provide a competitive edge in the LNG industry, demonstrating a commitment to efficiency, sustainability, and cost-effectiveness.
- Higher availability: Electric motor-driven plants often exhibit higher availability compared to gas turbine-driven plants. This means that the motor-driven plant has a higher likelihood of being operational and producing LNG consistently, resulting in increased revenue generation over the plant’s lifetime. The improved availability can contribute significantly to the NPV of the project.
- Shorter program schedule: The use of electric motors in LNG plants can contribute to a shorter program schedule. This reduction in overall project timeline can result in earlier revenue generation and a quicker return on investment. The NPV of the project is positively influenced by the accelerated cash flow. These two factors, higher availability and shorter program schedule, often outweigh the higher cost associated with the larger power plant. The increased revenue generation from the higher availability and the accelerated return on investment can lead to a net increase in the NPV of the project, making the electric motor-driven plant option financially advantageous. It is important to consider not only the initial CAPEX but also the long-term financial benefits and operational efficiencies when evaluating the overall viability and profitability of an LNG project
- Turbo-machinery: Turbo-machinery, including compressors and turbines, plays a critical role in the LNG liquefaction process. By utilizing advanced technologies and design enhancements, such as aeroderivative gas turbines (GTs), plant efficiency can be improved. Aeroderivative GTs offer higher power density, better fuel efficiency, and improved response times compared to traditional models. These characteristics contribute to overall improved plant performance and efficiency.
- Cryogenic heat exchange: Cryogenic heat exchange is another area where efficiency gains can be sought. Efficient heat transfer at extremely low temperatures is essential for effective LNG liquefaction. While exchanger temperature approaches have already been optimized to a certain extent, there may still be opportunities to explore innovative designs and materials that can further enhance heat transfer efficiency. Overall, by focusing on advancements in turbo-machinery, such as employing aeroderivative GTs, and exploring potential enhancements in cryogenic heat exchange, LNG plant efficiency can be improved. These improvements can lead to energy savings, cost reductions, and a more sustainable operation. It’s worth mentioning that continuous research and development efforts in the field of LNG technology are aimed at identifying new approaches and technologies to further enhance plant efficiency and sustainability
- Refrigeration compressors: The performance and efficiency of refrigeration compressors have a direct impact on the overall energy consumption and efficiency of the LNG plant. These compressors are responsible for compressing and cooling the natural gas to the required temperatures for liquefaction. By utilizing advanced compressor technologies, such as centrifugal compressors or axial compressors, and optimizing their design and operation, the energy efficiency of the liquefaction process can be improved. This leads to reduced power consumption, lower operating costs, and increased overall plant efficiency.
- GT drivers: Gas turbines serve as the primary drivers for the refrigeration compressors in LNG plants. The selection and performance of GT drivers have a significant impact on the overall efficiency of the plant. By using more efficient and advanced gas turbine designs, such as aeroderivative gas turbines, the power generation efficiency can be improved. This results in better utilization of the fuel and reduced emissions. Higher efficiency GT drivers contribute to improved overall plant efficiency and sustainability. Efforts in research and development continue to focus on advancements in both refrigeration compressors and GT drivers to enhance their efficiency and performance. This includes innovative designs, materials, and control systems that optimize their operation and minimize energy losses. By continuously improving and optimizing these key components, the efficiency of LNG plants can be significantly increased, resulting in cost savings, reduced environmental impact, and improved overall performance
- Enhanced System Reliability: By implementing the CC+ VSD technology, compressor driver options such as BASE 6, BASE 7, BASE 9, electric motor, and aeroderivative can benefit from advanced control and monitoring capabilities. This results in improved system reliability, reducing the risk of unplanned downtime. For example, the BASE 7 option with a speed of 3,612 RPM and a weight of 122,000 kg can be integrated with CC+ VSD to ensure reliable and continuous operation.
- Improved Efficiency and Performance: The integration of variable speed drive systems with compressor drivers can optimize their efficiency and performance. For instance, the electric motor option with an efficiency of 51.8% and the aeroderivative option with an efficiency of 42.8% can be further enhanced by CC+ VSD technology. This results in reduced energy consumption and improved overall plant efficiency.
- Flexibility and Load Adaptability: CC+ VSD allows compressor driver options to quickly adapt to varying operational conditions and load demands. The variable speed drive feature enables the adjustment of the driver’s speed and power output according to the requirements. For example, the aeroderivative option with a speed of 3,700 RPM can be efficiently controlled by CC+ VSD, offering flexibility and optimal load management.
- Optimal Resource Utilization: By integrating gas and steam turbines, the CC+ VSD system optimizes the use of available resources. This is particularly beneficial for the BASE 9 option, which has a higher ISO power of 131.0 MW and a weight of 218,500 kg. CC+ VSD ensures that these resources are utilized efficiently, reducing waste and minimizing environmental impact.
- Advanced Process Control: The CC+ VSD system applies advanced process control algorithms to continuously optimize the operation of compressor drivers. This is valuable for options like BASE 6 (ISO power: 32.6 MW) and BASE 7, as it allows for the precise adjustment of parameters such as pressure, temperature, and flow rates. This ensures optimal performance and prevents system instabilities…
- Fuel savings and increased LNG production: In cases where the gas supply is limited or constrained, the use of higher efficiency GTs becomes particularly advantageous. The fuel savings achieved through improved thermal efficiency directly contribute to increased LNG production. By maximizing the utilization of available gas resources, operators can optimize production levels and enhance project profitability.
- Compact and lightweight design: Aeroderivative GTs have a distinct advantage in terms of their size and weight. Compared to industrial GTs, aeroderivative models are approximately one-third of the weight and one-quarter of the footprint. This compact and lightweight design offers flexibility in installation and reduces space requirements, allowing for more efficient use of available space in the LNG plant layout.
- Higher thermal efficiency: Aeroderivative GTs are capable of achieving higher thermal efficiencies compared to industrial GTs. The advanced design and technology utilized in aeroderivative models enable them to extract more energy from the fuel input, resulting in improved overall plant efficiency. Even a small increase in thermal efficiency can have a significant impact on the overall performance of the LNG plant.
- Overall plant efficiency improvement: The higher efficiency of aeroderivative GTs can lead to a notable increase in the overall plant efficiency. With a more efficient gas turbine driving the refrigeration compressors, the liquefaction process becomes more energy-efficient, resulting in optimized power consumption, reduced operating costs, and enhanced overall plant performance. By leveraging the benefits of higher efficiency aeroderivative GTs, LNG plant operators can achieve cost savings, increase LNG production, optimize space utilization, and improve the overall efficiency and profitability of their operations. The utilization of higher efficiency aeroderivative gas turbines (GTs) in LNG plants offers additional advantages that contribute to improved operational performance and cost-effectiveness:
- Enhanced plant availability: The ability to quickly change out a complete aeroderivative GT within 48 hours, compared to the 15 days or more required for industrial GTs, significantly improves plant availability. This reduces downtime and ensures that the LNG plant can resume production promptly, minimizing revenue losses and optimizing operational efficiency.
- Reduced fuel consumption and CO2 emissions: The higher efficiency of aeroderivative GTs leads to reduced fuel consumption, resulting in lower CO2 emissions. By optimizing the energy conversion process, less fuel is required to generate the same amount of power, which not only lowers operating costs but also contributes to environmental sustainability goals.
- Comparative CO2 emissions: Published data on various LNG programs have shown that CO2 emissions in the range of 0.25-0.37 tons per ton of LNG produced have been reported. The use of higher efficiency aeroderivative GTs can contribute to the lower end of this range or potentially even lower, further reducing the carbon footprint of the LNG plant.
- Realistic fuel value impact: Taking into account a more realistic fuel value, such as $3-$5 per thousand cubic feet (mmcf), rather than the commonly applied value of $0.50 per mmcf for "stranded gas," can significantly improve the life cycle costs of the LNG plant. Considering the actual market value of the fuel helps provide a more accurate assessment of the economic viability and financial returns of the project. By considering these factors and incorporating higher efficiency aeroderivative GTs into the LNG plant design, operators can achieve improved plant availability, reduced fuel consumption and CO2 emissions, and enhanced cost-effectiveness throughout the project’s life cycl..
VALID POINTS REGARDING SOME OF THE CHALLENGES ASSOCIATED WITH AERODERIVATIVE GAS TURBINES (GTS) IN COMPARISON TO INDUSTRIAL GTS.
- Power output limitations: It’s true that the largest aeroderivative GTs, such as the LM6000, have a lower power output compared to large industrial GTs like the Frame 7. Aeroderivative GTs are typically designed for mechanical drive applications and have been optimized for specific power ranges. However, it’s important to consider the specific requirements and capacity needs of the LNG plant when selecting GTs. Depending on the size and configuration of the plant, multiple aeroderivative GTs can be utilized to meet the required power demands
- Maintenance requirements: Aeroderivative GTs do have more frequent maintenance intervals compared to industrial GTs. The time between major overhauls for aeroderivative GTs is typically around 24,000 hours, while industrial GTs may have longer intervals, around 48,000 hours. This is primarily due to the higher operating speeds and more advanced technologies employed in aeroderivative GTs. However, it’s worth mentioning that advancements in aeroderivative GT designs and materials have been made to improve reliability and reduce maintenance requirements.,
RAM Analysis

- GT Turbine Drivers: The performance of GT turbine drivers has a significant impact on production efficiency. Optimizing their maintenance schedule and reducing the duration of scheduled maintenance can help maximize availability.
- Scheduled GT Turbine Maintenance: The largest production loss is often attributed to the scheduled maintenance of GT turbines. It is crucial to carefully manage and optimize the maintenance schedule to minimize downtime and maximize production efficiency.
- Unscheduled Failures of GTs and Compressors: Unscheduled failures of GTs and compressors, which drive the refrigeration trains, contribute a notable portion of production losses. Addressing and mitigating these failures can lead to substantial improvements in availability, with GT failures accounting for up to 70% of losses and compressor failures accounting for up to 25% of losses. By strategically focusing on these areas, such as optimizing maintenance schedules, mitigating unscheduled failures, and prioritizing GT turbine drivers, LNG plants can enhance their availability and overall production efficiency.
- The restart losses after a plant trip indeed play a significant role as the third-largest contributors to production losses. However, by leveraging advanced software solutions like AP-Auto Cool™, which is linked with the Distributed Control System (DCS), the duration of restarts can be effectively reduced. This software enables efficient cooling and brings the plant back online swiftly, minimizing the impact on production efficiency. Additionally, it’s interesting to note that annual production efficiency can vary year by year. The highest efficiency is typically observed in years with no gas turbine maintenance. However, during major inspections (MI), combustion inspections (CI), and hot gas path inspections (HGPI), production efficiency can experience a drop of up to 5% or more for MI and up to 3% for CI and HGPI. Understanding these variations allows for better planning and optimization strategies to minimize the impact on overall production efficiency.
- Reduction in Scheduled Maintenance Durations: By reducing the duration of both Hot Gas Path Inspections (HGPI) and Major Inspections (MI) by approximately 5 days, there is a potential for increasing PE by around 0.4%. This optimization allows for shorter downtime during maintenance periods and maximizes the availability of the plant
- Use of GEExtendor™ Kits: The implementation of GEExtendor™ Kits, if applicable for the specific equipment, can extend the intervals between Combustion Inspections (CI) to twice as long. This can result in a significant increase in PE, with a potential gain of up to 0.8%. By reducing the frequency of CI, maintenance downtime is minimized, leading to enhanced availability and productivity.
- Single Train Restart Time Reduction: The cool-down time required for a single train restart significantly impacts PE. By implementing strategies to reduce this cool-down period, such as utilizing advanced cooling techniques or optimized procedures, PE can be increased by up to 0.2-0.3%. This allows for quicker resumption of production after a plant trip, minimizing the impact on overall efficiency.
- What-if’ Scenarios for Equipment Sparing: Running ’what-if’ scenarios to evaluate the impact of sparing selective equipment on PE is a valuable strategy. For example, assessing the impact of sparing the off-gas compressor can help determine if it positively affects PE. This analysis enables data-driven decision-making and ensures optimal allocation of resources to maximize production efficiency. By implementing these strategies and continuously exploring further optimization opportunities, GT-driven LNG plants can achieve significant improvements in PE and overall operational performance
INCREASING PLANT AVAILABILITY BY REVIEWING THE ACCEPTABILITY OF FLARING DURING SPECIFIC EVENTS CAN BE A VALUABLE STRATEGY. LET’S EXPLORE THE POTENTIAL BENEFITS OF THESE TWO SCENARIOS
- Flaring during FG Compressor Trip: Evaluating the acceptability of flaring during FG (Fuel Gas) compressor trips versus a train trip can help minimize production losses. By allowing controlled flaring during FG compressor trips, the plant can potentially avoid a full train trip, which would result in more significant downtime. This assessment ensures that production continues with minimal interruption, thereby enhancing plant availability.
- SRU Trip and Acid Gas Flaring: Similarly, reviewing the acceptability of SRU (Sulfur Recovery Unit) trips and acid gas flaring versus a train trip can significantly impact plant availability. If it is deemed acceptable to temporarily trip the SRU and implement controlled acid gas flaring during maintenance or operational issues, it can prevent a complete train trip. This helps minimize downtime and production losses, ensuring higher plant availability and production efficiency. By carefully evaluating and considering these scenarios, plant operators can make informed decisions to optimize availability while maintaining safety and compliance .
- FLARE MINIMIZATION: is a crucial aspect in the LNG industry, not only for reducing costs but also for mitigating environmental impact and ensuring compliance with emissions regulations. By implementing effective strategies, the program’s life cycle cost can be reduced, contributing to improved sustainability and operational efficiency.
- Review of HIPS (High-Integrity Pressure Protection Systems): High-Integrity Pressure Protection Systems have been successfully employed in the LNG industry to reduce costs without compromising overall safety. These systems provide advanced monitoring and control capabilities to prevent overpressure events and minimize the need for flaring. By implementing HIPS technology, operators can enhance safety, reduce flaring events, and optimize the program’s life cycle cost.
- Process Optimization: Conducting a thorough review of the LNG plant’s processes can identify areas where efficiency can be improved, leading to reduced flaring. Analyzing the operational parameters, equipment performance, and control strategies can help identify opportunities for process optimization and better utilization of resources.
- Advanced Flare Management Systems: Implementing advanced flare management systems can enhance the control and monitoring of flaring events. These systems provide real-time data and analytics to optimize flare operations, minimize unnecessary flaring, and improve overall efficiency. By actively managing and optimizing flaring, the costs associated with fuel consumption and emissions can be reduced. By considering these factors and exploring innovative technologies and strategies, operators in the LNG industry can achieve significant flare minimization, leading to cost savings, reduced environmental impact, and improved sustainability.
NITROGEN REJECTION IN LNG PROGRAM DEVELOPMENT:
- Nitrogen Content Reduction: While the typical nitrogen specification for LNG is around 1 mol%, further reduction in the nitrogen content can lead to shipping more LNG. By implementing nitrogen rejection processes, such as additional stripping or cryogenic distillation, the nitrogen content can be lowered, allowing for the shipment of additional cargoes per year. This optimization maximizes the utilization of the LNG carrier capacity and increases revenue potential.
- Compatibility with Re-Liquefaction Plants: Modern large LNG carriers are equipped with re-liquefaction plants to minimize boil-off gas. These re-liquefaction plants work optimally with low nitrogen content LNG. By reducing the nitrogen content through nitrogen rejection, the LNG becomes more compatible with the re-liquefaction plants, improving overall operational efficiency and reducing energy consumption during transportation. By implementing nitrogen rejection processes to reduce the nitrogen content in LNG, LNG program developers can take advantage of the potential to ship more cargoes per year and enhance compatibility with modern LNG carriers equipped with re-liquefaction plants. These optimizations contribute to maximizing revenue, improving operational efficiency, and optimizing the economics of the LNG program.
TO SUMMARIZE, INVESTING IN A STRIPPER COLUMN TO FURTHER REDUCE THE NITROGEN CONTENT IN LNG BRINGS SEVERAL BENEFITS TO THE LNG PROGRAM DEVELOPMENT
- Greater Annual Revenue: The production of high Btu, low nitrogen LNG allows for increased annual revenue. By reducing the nitrogen content, more LNG can be produced and shipped, maximizing the utilization of LNG carrier capacity and generating higher sales volume.
- Increased LNG Shipping Efficiency: The reduction in nitrogen content through a stripper column enhances LNG shipping efficiency. By removing more nitrogen, the volume of non-condensable gases in the LNG cargo is minimized, allowing for greater LNG capacity during transportation.
- Incremental Condensate Sales Revenue: The optimization of the LNG composition through nitrogen reduction not only benefits LNG sales but also provides an opportunity for incremental condensate sales revenue. The increased production of LNG results in more associated condensate available for sale, contributing to additional revenue streams. Overall, investing in a stripper column to further reduce nitrogen content in LNG brings financial advantages by increasing annual revenue, improving shipping efficiency, and providing additional revenue opportunities through incremental condensate sales. It optimizes the economics of the LNG program and maximizes profitability
- Increased Cargo Capacity: Newer LNG carriers, such as Q-flex LNG carriers, are fitted with re-liquefaction units. These units enable the re-liquefaction of boil-off gas during transportation, allowing for more cargo to be delivered with each voyage. This increased cargo capacity optimizes the utilization of the vessel and enhances the overall efficiency of LNG transportation.
- Control over Fuel Gas Quality: The presence and control of nitrogen content in the fuel gas are important considerations for meeting the gas quality requirements of Dry Low NOx (DLN) combustors. By having better control over the amount of nitrogen in the fuel gas, LNG program developers can ensure compliance with DLN combustor specifications. This enables the use of more advanced combustion technologies, improving overall operational efficiency and environmental performance. By leveraging the capabilities of newer ships equipped with re-liquefaction units, LNG program developers can maximize cargo capacity per voyage, optimize fuel gas quality, and enhance overall operational efficiency. These advancements contribute to improved economics, environmental sustainability, and compliance with industry standards in LNG program development.
ISSUES
- Limited Feed Gas for Incremental LNG: If there are constraints on the availability of feed gas, it can limit the ability to produce incremental LNG. This can be addressed by exploring options to increase feed gas supply through potential gas field developments, sourcing from alternative suppliers, or optimizing gas production and processing techniques to maximize the utilization of available feed gas.
- Fuel Gas Nitrogen Content: The fuel gas extracted from the LNG column may have a higher nitrogen content, which can pose challenges in meeting requirements for Dry Low NOx (DLN) combustion systems. To address this, blending the fuel gas with other sources that have lower nitrogen content can help meet DLN requirements. By carefully balancing the composition of the fuel gas, the necessary nitrogen levels can be achieved while ensuring compliance with environmental regulations. By understanding and addressing these issues, LNG program developers can overcome constraints related to feed gas availability and ensure compliance with combustion system requirements. This enables the efficient production of LNG while maintaining environmental standards and optimizing program economics.
- CONCLUSION.
- After carefully analyzing the extensive research on the topic of strategic mastery and unleashing the power of LNG program development through advanced techniques, an impactful and refined conclusion can be formulated: Due to the rapid expansion of the global LNG supply, the imminent LNG glut, and the persistently low energy prices, it is anticipated that certain marginal programs may be postponed temporarily. However, it is crucial to emphasize that these programs will still undergo continuous evaluation to enhance their economic potential in the future. This conclusion highlights the dynamic nature of the LNG industry, acknowledging the current challenges while also emphasizing the importance of ongoing assessment and improvement.Furthermore, it is essential to address the cost overruns and delays that have been experienced in certain recent LNG programs. To overcome these challenges, the implementation of a unique conceptual design master plan becomes imperative. This plan will serve as a comprehensive framework to reevaluate new programs, focusing on enhancing their economic viability and maximizing their rate of return. By adopting this approach, the industry can proactively mitigate potential setbacks and ensure the successful execution of future LNG initiatives.
- In the realm of strategic mastery and unleashing the power of LNG program development through advanced techniques, it is crucial to address the economic aspect by revisiting the program design concepts of all components involved, which include:
- Sub-sea: The exploration and extraction of LNG reserves beneath the seabed require meticulous planning and advanced techniques. By reevaluating the sub-sea component, we can identify innovative approaches to improve efficiency and cost-effectiveness in this crucial phase of LNG program development.
- Offshore: The transportation and processing of LNG from offshore facilities play a significant role in the overall success of the program. By revisiting the design concepts of offshore infrastructure, we can explore ways to optimize operations, reduce costs, and ensure greater reliability in the delivery of LNG.
- Onshore Advancement: The onshore components, including regasification terminals, storage facilities, and distribution networks, are integral to the LNG program’s success. By reassessing the design concepts of these onshore advancements, we can identify opportunities to enhance their economic viability, streamline operations, and improve overall performance. By revisiting and refining the program design concepts of these three components – sub-sea, offshore, and onshore advancement – we can unlock the true potential of LNG program development and achieve greater economic success.
- Design Efficiency: Evaluating the efficiency of the existing design criteria and identifying any potential areas for optimization can significantly enhance the program’s economics. This includes assessing factors like process flow, equipment selection, and operational efficiency.
- Cost Analysis: Conducting a detailed cost analysis helps in identifying potential cost drivers and exploring alternative cost-effective solutions. By carefully assessing the cost implications of various design elements, we can make informed decisions that contribute to improved program economics.
- Risk Management: Assessing the design criteria’s impact on risk factors such as safety, environmental considerations, and regulatory compliance is crucial. This allows for the implementation of risk mitigation strategies and the avoidance of costly delays and penalties. By thoroughly analyzing the design criteria and its impacts, we can identify areas for improvement, optimize program economics, and foster a more efficient and cost-effective LNG program development process.
- Program Site Selection: The selection of the program site has a direct impact on various costs, including dredging, site preparation, and infrastructure development. By carefully assessing site options, we can minimize these costs, which typically account for around 5% of the total investment cost (TIC).
- Accurate Environmental Data: Having precise environmental data is crucial as it helps reduce design risks associated with offshore facilities, trunkline routes, dredging operations, and the construction of an LNG jetty. By obtaining accurate data, we can make informed decisions that optimize design and minimize potential environmental impacts.
- Well Installation Costs: Evaluating the use of full subsea advancements versus offshore production facilities can significantly impact well installation costs, which typically make up around 12-15% of the TIC. By carefully assessing the feasibility and cost-effectiveness of each approach, we can identify opportunities to reduce installation costs and improve overall program economics. By considering these factors and incorporating them into the program design, we can optimize subsea and offshore advancements in LNG program development. This will help minimize costs, reduce design risks, and ultimately enhance the economic viability of the program.
- Full Subsea Recovery System: Implementing a full subsea recovery system eliminates the need for costly offshore real estate and ongoing operating costs associated with traditional offshore production facilities. However, it is crucial to balance these benefits against potential drawbacks, such as reduced access to wells and reduced flexibility in terms of operations and maintenance.
- Substructure - FLNG Concept: The FLNG (Floating LNG) concept involves placing the LNG plant directly at the production site, eliminating the need for a trunkline, onshore receiving, storage, and export facilities. This approach offers advantages such as reduced infrastructure requirements and potentially shorter project timelines. However, it is essential to carefully assess the feasibility and economic viability of this concept based on factors like environmental considerations, production capacity, and market demand. By considering the pros and cons of these subsea and offshore advancements, we can determine the most suitable approach for a specific LNG program. This evaluation ensures that the chosen design balances cost-effectiveness, operational efficiency, and overall program viability.
- FPSO for Condensate Recovery: If the field contains a significant amount of condensate, using an FPSO instead of a platform can be advantageous. This allows for the direct recovery and export of condensate from the field, while the remaining dry gas can be transported onshore for further processing and export. This approach optimizes the utilization of resources and maximizes the economic value of the field.
- Phase-in Future Compression: As the field declines, it is important to evaluate the approach of introducing compression facilities. Instead of investing in additional facilities upfront, considering a phased approach allows for flexibility in aligning compression capacity with the declining production rates. This approach ensures cost-effectiveness and avoids overinvestment in unnecessary infrastructure.
- Trunkline Configuration: When evaluating trunkline options, it is essential to assess the advantages and disadvantages of wet trunklines versus dry trunklines or those with MEG (monoethylene glycol) injection. Factors such as pipeline capacity, maintenance requirements, and hydrate prevention should be considered to determine the most suitable configuration for the specific field conditions. By considering these aspects, the LNG program development can optimize condensate recovery, manage production decline effectively, and select the most appropriate trunkline configuration. This ensures a cost-efficient and successful program implementation while maximizing the economic benefits of the LNG project.
- Train Size & Number: The sizing and number of LNG trains should be carefully balanced to achieve economies of scale. While larger trains may offer cost advantages, there is a need to evaluate the optimal size that maximizes efficiency and minimizes operational costs. Pre-investing in infrastructure that can accommodate potential future expansion is also crucial to avoid costly modifications later on.
- Modularization vs Stick-Built or Hybrid Design: Assessing the feasibility of modularization versus traditional stick-built construction, or a combination of both, can lead to potential cost savings of around 10-15% of the total investment cost (TIC). Modularization allows for standardized construction in controlled environments, reducing on-site construction time and improving project execution efficiency.
- Plot Space Reduction: Optimizing plot space utilization is essential in onshore LNG advancements. Techniques such as stacking chillers, employing proprietary vessel internals, eliminating unnecessary equipment like the C3 compressor blocked discharge case, and consolidating flare stacks in a derrick structure can help reduce the overall plot space requirements. This frees up valuable land for other purposes and may lead to cost savings.
- Motor Driven Plant: Implementing a centralized power plant with motor-driven equipment can potentially increase LNG production by up to 0.5%. Centralizing the power supply allows for better control and optimization of energy usage, leading to improved overall plant performance and increased production output.
- Aeroderivative Gas Turbines (GTs): Integrating aeroderivative gas turbines into the LNG plant can significantly improve efficiency by more than 3%. These advanced turbines offer higher power-to-weight ratios, enhanced fuel flexibility, and lower emissions. By adopting aeroderivative GTs, the carbon footprint of the plant can be reduced by up to 30%, contributing to environmental sustainability.
- Conceptual RAM Analysis: Conducting a Reliability, Availability, and Maintainability (RAM) analysis at the conceptual stage helps identify options for increasing LNG production. One crucial aspect to consider is restarts, which can be a significant contributor to production losses. Evaluating options such as restarting at full pressure or with partial depressurization can minimize downtime and optimize production efficiency.
- Flare Minimization: Designing the plant for high turndown and considering High Integrity Pressure Protection Systems (HIPS) can help minimize flaring and reduce both program life cycle costs and the carbon footprint. Flaring can be minimized by designing the plant to efficiently handle fluctuations in production, avoiding unnecessary flaring during periods of low demand. Additionally, designing for high Fuel-Flexible Firing (FFF) in the fuel balance can help prevent excess flaring by utilizing fuel as efficiently as possible.
- Nitrogen Rejection: Maximizing nitrogen stripping during LNG processing increases shipping efficiency by reducing the volume of non-condensable gases in the LNG cargo. This optimization not only enhances revenue by allowing for increased LNG sales, but it can also provide incremental condensate sales volume, further maximizing profitability. By prioritizing flare minimization and maximizing nitrogen stripping, LNG program development can achieve cost savings, reduce environmental impact, and increase revenue generation. These strategies contribute to a more efficient and sustainable LNG program.
Author Contributions
Funding
Acknowledgment
Conflicts of interest
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| ISO ( COMPRESSOR DRIVER OPTIONS) | |||||
|---|---|---|---|---|---|
| ISO POWER, MW | EFFICIENCY | RELATIVE,CO2 | SPEED&RPM | WEIGHT.KG | |
| BASE 6 | 32.6 | 30.1 | 2.0 | 4,480 | 111,000 |
| BASE 7 | 87.4 | 34.0 | 0.94 | 3,612 | 122,000 |
| BASE9 | 131.0 | 35.4 | 0.85 | 4000 | 218,500 |
| ELECTRIC MOTOR | 66.0 | 51.8 | 0.63 | Variable | - |
| AERODERIVATIVE. | 44.8 | 42.8 | 0.72 | 3,700 | 32,000 |
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